AI agents / App builders

Bolt.new
by StackBlitz
In-browser AI app builder from StackBlitz.
Closed sourceFree optionApp builders
Strengths
- Runs entirely in the browser
- Free plan
- Token-based Pro with no daily cap
Weaknesses
- Token budgets to watch
- Best for web stacks
- Not open source
| Best for | Quick web app prototypes without local setup |
|---|---|
| Not for | Large production codebases |
| Pricing | Free; Pro $25/mo; Teams from $30/member/mo |
| Open source | No (Proprietary) |
| Category | App builders |
| Verified | 2026-10-14 |
Alternatives
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+ Build, host and deploy in one place
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Prompt-to-web-app builder for full-stack apps.
+ Fast from idea to working app
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Vercel's agent for generating and shipping web UIs and apps.
+ Strong React/Next.js UI output
− Credit-based usage
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Related task guides
Sources
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